Junger Audio d06 User manual

2ch digital audio leveller

d06

LEVEL MAGIC™

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FOREWORD

Thank you for buying and using the 2-channel Digital Audio Level Processor

d06.

You have acquired the latest generation of digital dynamic range processing

and also a piece of equipment which is unique in its design and

specification.

Please read this manual carefully to ensure you have all the information you

need to use the 2 - channel Digital Audio Level Processor d06.

The unit was manufactured to the highest industrial standards and went

through extensive quality control checks before it was supplied.

If you have any comments or questions about installing, setting-up or using

the d06, please do not hesitate to contact us.

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CONTENT

2. Function description

2.1 Basic description

2.2 Block diagram

2.3 Audio signal processing

2.3.1 Gain

2.3.2 Audio Leveler Level Magic™

2.3.3 Limiter

2.4 The Jünger Audio Dynamics Principle

2.4.1 Program

2.4.2 Influence of signal delay time

3. Installation

3.1 Unpack the unit

3.2 Power supply

3.3 Connections

3.4 Rack mounting

3.5 Operation safety

3.6 Synchronization the digital output

3.7 Rear panel connectors

3.7.1 Audio connections

3.7.2 GPI

3.7.3 GPO (tally)

3.7.4 Serial RS422 or RS232 or CAN

3.7.5 LAN ( Ethernet)

3.8 Switches and jumpers for configuration

3.8.1 Selection of the serial remote interface

3.8.2 Calibration of the analog inputs and outputs

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4. Network integration

5. Operation

5.1 GUI operation

5.1.1 Setting the d06 parameters

5.1.2 Setup the device

5.1.3 General settings

5.1.4 Preset operation

5.1.5 GPI/O set up

5.1.6 LAN Controller set up

5.1.6.1 System Configuration

5.1.6.2 Backup 6 restore

5.1.6.3 Software update

5.1.6.4 Reboot the LAN Controller

5.2. Front Panel Operation (optional)

5.2.1 Setting the reference levels

5.2.2. Menu selection

5.2.3. Preset menu

5.2.4. Configuration menu

5.3.5. Parameter menu

6. Technical specifications

7. Warranty and service information

8. CE Declaration of Conformity

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2. FUNCTIONAL DESCRIPION

operation manual d06, chapter 2 - Functional Description - page 1 of 8

FUNCTIONAL DESCRIPTION

The digital dynamics processor d06 is a professional studio device that is

performing automated levelling of digital audio signals.

The dynamic range processor principles developed by Jünger Audio enable

level managing devices like compressors, AGC and limiters to be produced

with exceptionally high audio quality, without coloration, pumping, breathing,

distortion or modulation effects sometimes associated with this type of

processor.

In short, almost inaudible processing - with ease of use. The outstanding

quality of the processing is based on the Multi-Loop dynamic range control

principle in combination with adaptive controlled processing algorithms

developed by Jünger Audio.

The unit is easy to operate and requires only a limited number of settings to

be made by the user to achieve optimum results. All other parameters

necessary for inaudible processing are continuously automatically controlled

in response to changes in the programme signal.

features

• 2-channel digital audio levelling processor

• various link modes: stereo 1/2 or ch1 and ch2 independent

• adjustable input gain (channel independent) -20...+20 dB

• adaptive controlled audio levelling processing

- Leveler, Transient Processor, Limiter

• user friendly preset and recall function (10 presets)

• extern sync mode, AES/EBU, WCLK or VIDEO

• RS-232/422 interface for serial remote

• GPI interface for parallel remote control, tally output

• operation via web interface (LAN)

• optional operation via front panel

2.1

BASIC

DESCRIPTION

2

2. FUNCTIONAL DESCRIPTION

operation manual d06, chapter 2 - Functional Description - page 2 of 8

2.2

BLOCK

DIAGRAM

2. FUNCTIONAL DESCRIPION

operation manual d06, chapter 2 - Functional Description - page 3 of 8

All signal processing is done in the digital domain by Texas Instruments

floating point signal processors. The use of 32 bit word length for calculation

ensures that there is no deterioration in signal quality, even if an audio signal

with a maximum word length of 24 bit is input into the processing of the unit.

GAIN means linear amplification of input signals. The input gain can be

changed in steps of 0.1 dB , within a range from -20...+20 dB for both

channels.

Level Magic ™ is a unique algorithm to make automated audio levelling

possible.

2.3

AUDIO SIGNAL

PROCESSING

2.3.1

GAIN

2.3.2

AUDIO LEVELLER

LEVEL MAGIC™

AGC

Input level change

Pic. 2 is showing a

theoretical level change of

+5dB and –5dB around

program level.

Working with AGC

In pic.3 a conventional

AGC is used to adjust the

level. As we can see the

AGC needs a certain time

to react, that is necessary

for mostly inaudible gain

correction. But that’s too

long to get a proper

correction of the input level

change.

Level Magic ™

Level Magic ™ is a unique

combination of a transient

processor and an adaptive

AGC process. The

transient processor can fill

the lack of level control

against the slow acting

AGC. The total gain of

Level Magic ™ is the

addition of the gain by the

transient processor and the

gain of the AGC.

adaptive

AGC

Transient

Processor

2. FUNCTIONAL DESCRIPTION

operation manual d06, chapter 2 - Functional Description - page 4 of 8

The Level Magic ™ process needs to be setup in three steps

- select one of the default presets for your apllication

(see preset description in chapter 5)

- adjust the operation level and peak level referring to standards that

are used for your application

- if the default preset is not giving satisfying results change the

parameters indivdually

Level Magic ™ is using a unique combination of QP and RMS level detectors

to analyze the incoming audio signal. By comparing QP and RMS

measurement results we can find out how much transients are coming in.

Dependent on that the necessary resulting gain is controlled in relation

between transient processor and AGC.

Transient processor is doing fast gain change and the AGC is doing slow gain

change (depending on settings). The way how Level Magic is acting on the

audio is mostly determined by balancing between slow and fast gain changing

process. The AGC should be set in a way that the gain change is mostly

inaudible (1dB per 5 seconds or slower). The Transient Processor should be

set that incoming level jumps are reduced but originally dynamic range is not

changed too much. As more possible gain by the Transient processor

(RANGE), as more reduction of the dynamic range will be.

SOFT level control: AGC range …15dB, time >=2min

Transient range …4dB, soft process

MID level control: AGC range …12dB, time >=1min

Transient range …6-8dB, mid process

HARD level control: AGC range …10dB, time >=40sec

Transient range …10dB, hard process

Parameter description:

AGC

OP-level operation level, target level for the AGC and for

the Transient Processor

Range max. gain by the AGC

Time time to reach the max. gain change

Gate threshold level where the AGC stops gain

change and moves gain slowly to the long

term average gain

Transient Processor

Process a combination of level ratio and release

characteristic for the fast gain change (soft, mid,

hard)

Range max. level change by the Transient Processor

Adjustment

procedure

Process

description

Parameter

description

Transient

Processor

AGC

Level

Detection

Limiter

2. FUNCTIONAL DESCRIPION

operation manual d06, chapter 2 - Functional Description - page 5 of 8

The static characteristics of the d06 limiter usually refers to a digital output

level of 0 dBFS (dB Full Scale). This is useful for most applications of the

dynamics processor as the on-following digital recording system is supposed

to be balanced down to the final bit.

For applications using headroom the output level can be adjusted within 0 ... -

20 dBFS in steps of 0.1 dB. The limiter threshold determines the maximum

output level.

The static characteristic for the limiter at a limiter threshold of -12dBFS is

illustrated in fig. 6.

-50

-40

-30

-20

-10

[dBFS]

-10

-20

-30

-40

-50

-60

output

input

limiter

threshold

0...-20dBFS

max. output

level

For the dynamics functions a signal delay of approx. 2 ms is built in. This

delay makes it possible to arrange the algorithm of the limiter in such a way

that the control mechanism is activated before maximum level is reached (look

ahead limiter). Within the rise time of the signal the peak level is recognised

and the maximum is calculated in such a way that limiter threshold level is

reached precisely without causing clipping.

A change in the dynamic range of an audio signal is a non-linear process. The

gain of a dynamic range processor is not constant as it is with the gain of a

linear amplifier. The gain varies in time depending on the input signal and

depending on the specific control algorithm of the dynamics processor. These

variations in the gain, which represent the real control process, should take

place without any bothersome side effects.

The dynamic range processor principle developed by Jünger Audio makes it

possible to realize dynamics processors (compressor, limiter, expander) with

very high audio quality, without signal discoloration, pumping or breathing,

without distortion and modulation products - in short, with almost inaudible

processing - and they are very easy to use.

2.3.3

LIMITER

fig. 6:

basic function:

limiter

2.4

THE JUNGER

AUDIO DYNAMICS

PROCESSOR

PRINCIPLE

2. FUNCTIONAL DESCRIPTION

operation manual d06, chapter 2 - Functional Description - page 6 of 8

The Junger Audio dynamics processors work according to a Multi-loop

principle, operating with an interaction between several frequency linear

control circuits. This is quite different to the popular multiband structure which

changes the sound.

The resulting attack and release times of the Multi-loop system are variable

and adapted to the evolution of the input signal. This allows relatively long

attack times during steady-state signal conditions but also very short attack

times when there are impulsive input transients.

The Multi-loop structure also permits a short time delay between the control

circuit and the gain changing element. The gain control circuit has time to

preview the signal and become active before it reaches the output. This is

particularly important for the limiter, which provides a precisely leveled output

signal absolutely free of overshoots (clipping).

For some of the control parameter it is possible to define a limited range of

time constant values which are allowed for the adaptive dynamic range

algorithms. Inside this range the time constants can be varied by the adaptive

processing. Setting the range of time constant values may be sometimes

useful, to get the best signal processing performance regarding specific

programme material.

Parameter related to the transient response of the control circuit are important

for distortionfree processing. These time constants are allways adaptive

controlled without remarkable limitation of parameter range. This is caused by

the presence of transient pulses in allmost each kind of programme material.

The algorithm has to guarantee best reaction for fast increasing level of

transient signals anytime even if classical music with slow dying out

characteristic is processed. In all cases the attack time of the limiter for very

short transients is zero.

2.4.1

PROGRAM

A A

f

delay

1

2

n m

f

Multi - Band Multi - Loop

2. FUNCTIONAL DESCRIPION

operation manual d06, chapter 2 - Functional Description - page 7 of 8

Especially the release time of the control circuit has more influence to the

increase of loudness as any other parameter. The ranging of time constants in

processing time groups reflects this fact. The range for processing time shows

influence on release time parameter mostly.

The selection of the parameter limiter PROCESS changes the range of time

constant values as follows:

PRO processing time

---------------------------------------------------------

0 2 ms to 0.2 sec

1 5 ms to 0.5 sec

2 10 ms to 0.8 sec

3 15 ms to 1.2 sec

4 30 ms to 2.5 sec

5 50 ms to 3.5 sec

6 70 ms to 5.0 sec

7 100 ms to 6.0 sec

8 150 ms to 8.0 sec

9 250 ms to 10.0 sec

The audio signal delay through the dynamics processor is approx. 2ms due

to delaying of the audio signal using internal memory. A small delay is

deliberately introduced to the audio signal in order to allow limiter and

compressor algorithms which can 'preview' the audio signal before

changing it. That is the signal curve can be changed before maximum level is

reached. This delay must be considered before attempting to mix signals

processed by the dynamics processor with other undelayed signals.

When mixing together a delayed signal and a direct signal there may be

cancellation of the signal waveform at some frequencies and re-inforcement

of the waveform at other frequencies (comb filter effect). Corresponding

2ms delay of direct signals should therefore be carried out before mixing

them with delayed processed signals.

2.4.2

INFLUENCE OF

SIGNAL DELAY

TIME

2. FUNCTIONAL DESCRIPTION

operation manual d06, chapter 2 - Functional Description - page 8 of 8

3. INSTALLATION

operation manual d06, chapter 3 - Installation - page 1 of 10

INSTALLATION

The digital audio level processor d06 was packed carefully in the factory and

the packaging is designed to protect the equipment from rough handling.

Please examine carefully the packaging and its contents for any signs of

physical damage, which may have occured in transit.

The digital audio level processor d06 is a device under the safety category

Schutzklasse 1 in keeping with the VDE 0804 standards and may only used

with power supply installations built according to regulations.

Check the voltage details printed at the rear panel are the same as your local

mains electricity supply.

The digital audio level processor d06 is equipped with standard connectors

(see also chapter 3).

Before connecting the digital audio level processor d06 switch the power off at

all connected units.

The digital audio level processor d06 is made as standard 19“ unit (EIA

format). It occupies 1 RU (44 mm height) space in a rack. Please allow at

least additional 3inch of space for the connectors on the rear panel.

When installing the unit in a 19“ rack the rear side of the unit needs some

support, especially for mounting in flight cases.

The digital audio level processor d06 should not be installed near units which

produce strong magnetic fields or extreme heat. Do not install the audio

processor directly above or below power amplifiers.

If, during operation, the sound is interrupted or displays no longer illuminate,

or if abnormal odor or smoke is detected immediately disconnect the power

cord plug and contact your dealer or Junger Audio.

3.1

UNPACK THE

UNIT

3.2

POWER SUPPLY

3.3

CONNECTIONS

3.4

RACK MOUNTING

3.5

OPERATION

SAFETY

3

3. INSTALLATION

operation manual d06, chapter 3 - Installation - page 2 of 10

The digital audio level processor d06 has a digital signal output. For the

problem-free combination of following digital devices, the digital signal

processing can be locked to an external clock reference. The selection of the

corresponding sync source is made in the SYNC MODE menu during setup. If

the chosen sync input is connected with the sync signal, this signal is used for

synchronization automatically. All sync sources can be used for locking A/D-

converters at the analogue inputs as well. The digital output signal can be

clocked with the following clock frequencies:

INTERNAL locks both the A/D-converters and the digital output with

the internal reference 44,1 or 48 kHz. Digital inputs are

connected via sample rate converter

AES INPUT locks with the clock frequency of the input signal at

digital input CH 1/2 (AES/EBU, 44,1...48 kHz)

EXT AES locks with the AES signal at the sync input

(AES, 44,1...48 kHz) Digital inputs are connected via sample

rate converter

EXT WCLK locks with the word clock signal at the sync input

(WCLK, 44,1...48 kHz) Digital inputs are connected via sample

rate converter

EXT VIDEO locks with black burst at sync input (internal 48 kHz) Digital

inputs are connected via sample rate converter

Important Note! Video Sync is an option for the d06. For the very rare case

that you can not synchronize the d06 to AES, you may buy such option from

Junger Audio. Pls contact your local dealer for details.

POWER INPUT

IEC mains input connector 85-264V, 50/60 Hz with integrated fuse

REMOTE

serial remote interface RS-422 (232)

connector: 9pin SUB-D, female

GPI

parallel remote interface

TALLY-out open relay contact

connector: 25pin SUB-D, female

GPI-in optical coupler +3,5…+30V

connector: 15pin SUB-D, female

3.6

SYNCHRONIZING

THE DIGITAL

OUTPUT

3.7

REAR PANEL

CONNECTORS

DIGITAL

I/O ANALOGUE

I/O

SYNC IN

WCLK OUT

LAN-controller

web interface

SERIAL

REMOTE

GPI REMOTE

IN/OUT

3. INSTALLATION

operation manual d06, chapter 3 - Installation - page 3 of 10

SYNC

SYNC IN input for ext. sync signals :

AES 3 format, 75 Ohm, unbalanced

video sync (black burst), 75Ohm, unbalanced

word clock (TTL level), 75Ohm, unbalanced

Connector : BNC socket

WCLK OUT output for word clock (system clock of d06)

(TTL level), 75Ohm

Connector : BNC socket

DIGITAL IN

AES/EBU standard format

Connector : XLR female

DIGITAL OUT

AES/EBU standard format

Connector : XLR male

ANALOG IN/OUT

Analog input 24bit A/D-converter

floating, balanced

Connector : XLR female

Analog output : 24 bit D/A-converter

Floating, balanced

Connector : XLR male

The analogue audio inputs are RFI filtered. Analog I/Os are balanced and

floating like transformer coupled devices. All the audio connectors are via rear

panel mounted connectors. Standard XLR connectors are used. These are

always wired to the AES standard:

pin 1 X Shield

pin 2 L Live audio 0°

pin 3 R Return audio 180°.

Balanced connections are preferred whenever the other equipment provides

balanced inputs/outputs. All line level connections should be wired with twin

shielded cable for low noise and reliability. The shields of the cable should be

connected at one end only. Input cable shielding therefore needs to be

derived from the signal source end as pin 1 is ground lifted for low frequencies

at the inputs.

If the equipment that drives the digital audio level processor d06 has

unbalanced outputs you must add a wire jumper to connect Pin 1 of the XLR

to Pin 3.

If the equipment connected to the d06 has unbalanced inputs only, we

recommend to use a balanced (i.e. 2 core shielded) cable where Pin 1 and

Pin 3 are connected in the XLR plug end away from the digital audio level

processor d06.

3.7.1

AUDIO

CONNECTIONS

3. INSTALLATION

operation manual d06, chapter 3 - Installation - page 4 of 10

The digital audio level processor d06 can be remote-controlled by means of

parallel GPI inputs.

Use to : * recall of PRESETs 1-4

* switch between STEREO / 2CH link mode

* selection of INPUT 2 / 1

* switching the device to BYPASS

Connector : D-SUB 15pin, female

Pin assignment of the connector :

Pin Signal name Functions

1 GPI1 in Defined by d06 config

2 GPI2 in Defined by d06 config

3 GPI3 in Defined by d06 config

4 GPI4 in Defined by d06 config

5 GPI5 in Defined by d06 config

6 GPI6 in Defined by d06 config

7 GPI7 in Defined by d06 config

8 GPI8 in Defined by d06 config

9 + 5V 110 Ω

10 GPI1/GPI2 common

11 GPI3 common

12 GPI4 common

13 GPI5 common

14 GPI6 common

15 GPI7/GPI8 common

Shield -5V GND of d06 Chassis

Electrical specification :

GPI input potential free by opto-coupler in line with

a current source

ON: +3.5…+30V between GPIx input

and GPx common

OFF: less then 1.5V between GPIx input

and GPIx common

For serial numbers S/N 59 and higher (HW Revision 2a and higher) the

polarity of the GPI inputs has been changed. to make use of the internal

ground based auxiliary 5 V for "low active" switching.

ON: -3.5…-30V between GPIx input

and GPx common

OFF : less then 1.5V betwee GPIx input

and GPIx common

Signal duration must be at least 50msec.

Note : An internal auxiliary voltage feed of +5V is available on pin 9

via a 110 Ω resistor. Ground is available from the shield of the connector

only! When using the auxiliary voltage feed, there is no electrical isolation

given anymore and the risk to inject unwanted noise is high!

Important Note : You must take care about the polarity of the external voltage

applied to the GPIs. Wrong polarity may destroy electronic components

and may cause fire inside the d06!

3.7.2

GPI

3. INSTALLATION

operation manual d06, chapter 3 - Installation - page 5 of 10

The digital audio level processor d06 can aknowledge specific device statuses

via parallel GPO (Tally) lines.

Use to : monitor the d06 status

Connector : D-SUB 25pin

female panel jack

Pin assignment of the connector :

Pin Signal name Functions

1 Tally 1 normally closed

2 Tally 1 normally opened Defined by d06 config

3 TALLY 2 common

4 Tally 3 normally closed

5 Tally 3 normally opened Defined by d06 config

6 TALLY 4 common

7 Tally 5 normally closed

8 Tally 5 normally opened Defined by d06 config

9 Tally 6 common

10 Tally 7 normally closed

11 Tally 7 normally opened Defined by d06 config

12 TALLY 8 common

13 + 5V 110 Ohm

14 TALLY 1 common

15 Tally 2 normally closed

16 Tally 2 normally opened Defined by d06 config

17 TALLY 3 common

18 Tally 4 normally closed

19 Tally 4 normally opened Defined by d06 config

20 TALLY 5 common

21 Tally 6 normally closed

22 Tally 6 normally opened Defined by d06 config

23 TALLY 7 common

24 Tally 8 normally closed

25 Tally 8 normally opened Defined by d06 config

Screen -5V GND of do6 chassis

Electrical specifications :

Tally output relay : common / normally closed / normally opened

24V - 1A

125V - 0,5A

P

max = 62,5VA

3.7.3

GPO (TALLY)

3. INSTALLATION

operation manual d06, chapter 3 - Installation - page 6 of 10

The digital audio level processor d06 can be remote-controlled by means of

serial remote RS-232/422.

Use : * network configuration

* administrative setup (consol interface)

Protocol : available on request

Connector : D-SUB 9pin

female panel jack

Pin assignment of the connector in serial interface mode :

Pin Signal name Functions

1 Rx + RS422

2 TxD RS232

3 RxD RS232

4 NC not used

5 GND Ground

6 Rx - RS422

7 NC not used

8 Tx - RS422

9 Tx + RS422

Pin assignment in CAN-bus mode :

Pin Signal name Functions

1 NC Not used

2 CAN-l CAN-bus low signal

3 NC Not used

4 NC Not used

5 GND Ground

6 GND Ground

7 CAN-H CAN-bus high signal

8 NC Not used

9 NC Not used

This connector has multiple functions which may be internally changed by

connectors and jumpers (see 3.8). The factory default format setting is RS232

and it is connected with the serial interface of the LAN Controller.

By using a terminal program (115kB/sec. 8,N,1 no flow control) you may

communicate with the consol of the LAN Controller, e.g. to change the IP

configuration of the device.

3.7.4 Serial

RS422

or

RS 232

or

CAN

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Junger Audio d06 User manual

Junger Audio d06 User manual

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